Piebee e



(No Model.)

P. E. JAY.

Pump. No. 234,407. Patented Nov. 16,1880.

Unrran STATES PIERRE E. JAY, OF NEV YORK, N. Y.

PUMP.

SPECIFICATION forming part of Letters Patent No. 234,407, dated November 16, 1'880. Application filed August 14, 1880. (No model.)

To all whom it may concern:

Be it known that I, PIERRE E. JAY, of the city, county, and State of New York., have inventcd certain Improvements in Pum ps, of which the following,` is a specification.

The object of this invention is to provide a means whereby the piston-packing of ypumps, &c., may be readily adjusted, or, in case of necessity, replaced without disturbing those fixed portions of the pump to which the pipes or connections are ordinarily permanently attached.

The invention comprises certain novel combinations of parts whereby this object is secured. I

Figure l is a Vertical longitudinal sectional view of apump embracing' my said invention, with the parts and the relation occupied by them when the pump is ready for use. Fig'. 2 is a similar view of the same, but showing,` the parts as arrang'ed or disposcd in order to afford access to the packing.

A and B are, respectively, the upper and lower portions of the pump body or barrel, to which said portions are ordinarily attached the pipes, connectons, Sto., of the pump, and which are fixed stationary or permanent. The inner end of each of the portions A B is provided with an internal screw-thread, as shown at a on the part Aand at b on the part- B. O is the central portion of the pump barrel or body, and is internally threaded at both ends, as represented in the drawings. This central portion, O, is connected with the upper part, A, by an externally-threadcd section, E, which, at one end, is screwed into the section A and at the other into the section O. In like manner the central portion, O, is connected with the lower part, B, by another eXternally-threaded section, F. The sections E F are of cylindrical form, have the sameinternal diameter, and are placed in the same axial line. Apart from the space occupied by thepacking` herein presently explained, the sectionsEF eonstitute the bore of the pump, as more fully illustrated in Fig.

1. .Provided internally to the central portion, O, is an inwardly-projecting,` circumferential rib, c, having;` a transverse section, substantially such as is represented in the drawings* that is to say, wedge Shape, with its upper and lower surfaces, respectively, sloping inward.

Placed between this internal wedge-shaped rib c and the adjacent inner end ot' the sections E F are two ring's, ef, the inner surfaces of which are made sloping,` at an angle to the adjacent surface of the rib c, as represented in the drawing's. A double packing, or-rather two separate packings, are provided by placing,` a suitable gasket or packing-ring in each of the spaces between the internal rib, c, and the rings ef, it being` manifestthat byturning the sections E F to force their inner ends inward toward the internal rib, c, the packing indicated at g will be crowded inward around and'against the circumference of the pump-plunger, which in the drawing's is represented at D. The sections E F, and also the central portion, O, are provided with hexagonal collars h, which may be grasped by a wrench in order to turn the sections E F or either of them with reference to other parts of the pump-barrel, as herein presently explained. Placed upon the threaded exterior of the section E are jam-nuts E' E, and in like m anner upon the threaded exterior of the section F are placed similar jam-nuts, FI F, the use and object of which are to provide for making snug the joints between the sections E F and the adja-cent parts at which they are connected, as hereinbefore explained.

In order to gain access to the lower packing, G, it is only necessary to turn the lower section, F, to screw the same in a downward direction into thelower part, B, of the pumpbarrel, which, of course, brings the said section F out of and away from the central portion, O, theinternal screw-thread of the central portion, O, being, of course, coincidentin character and pitch with that of the part B aforesaid. By thus bringing` downward the lower section, F, sufficient space is provided to afford access to thelowermost of the packingrings g, which said space may be further increased by screwing the upper section, E, upward into the part A. When it is desired to have access to the uppermost of the packingrings the section E is operated in like manner, the said section E being,` in that case screwed upward into the part A and out of the central portion, (J. It is, of course, to be understood that in thus manipulating either the section E or the section F, the jam-nut F' or Ef, as the case may be, is screwed as far as may be away IOO from the outer end of the section to be moved. the outer euds of the jam-nuts IG' E and F' F being simply to hold snugly against the ends of the two Sections E F and of the central portion, O, respectively, when the parts are in position for the use of the pump, and also to render more tight and snug the joints between the central portion and the Sections E F, and those between the Sections E F and the upper and lower parts, A B.

It will be particularly observed that by my aforesaid invention all the effects ot' expansion and contraction, the cause of changes of temperature in the pump-barrel, are provided against, inasmuch as the packing is readily compressed to any required degree against the plunger, and any expansion which would vary the Vertical width of the receptacles of the packing is thereby easily compensated.

It will further be understood by reference to the drawings that the plunger being of less diameter than the bowl of the pump-barrel there is no 't'riction whatever, except where the two packingrings come in contact with the plunger, and that this friction is only proportioued to the pressure with which the packing is forced inward against the pluuger by the operation of the sections, as hereinbefore explained.

That I claim as my invention is- 1. A pump body or barrel constructed with one or more scrcW-sections capable of longitudiual adjustmeut to atford access to the interior of the said barrel, substautially as and for the purpose herein set forth.

2. In a pump-barrel, the combination of the internally screw-threaded end parts A and B, the externally screw-threaded Sections E and F, and the internally screw-threaded central portion, O, carrying a suitable packing and a plunger, D, all substantially as and for the purpose herein set forth.

3. Theinternally-threaded central portion, O, constructed with the internal circumferential rib c, the two paekiug-rings c f, the externallythreaded Sections E F, the internally-threaded end part-s A B, and the piston D, all substantially as and for the purpose herein set forth.

et. The combination of the jam-nuts F' F and E' E with the internally-threaded end parts, A B, the eXternally-threaded Sections E F, and the internally-threaded central portion, G, of the pump-barrel, all substantially as and for the purpose herein set forth.

PIERRE E. JAY.

Witnesses CHAS. H. DoxA'r, J AMEs A. W HrrNnY. 

